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` seincafil Qrnettrsratent No. 12,673, dated Apii 1o, 1855.

i ToaZZ whom/imag concemz'pf i Be itlknown thatixlylosmn "J: DU'roimn,` `of` the ."cityff andi county "of" "New Haven and State of Connecticut, .fha'vei `invented l certain new andmseful `Improvements in CoalfBurn- W i ing-LocomotivelfBOilers andtheir Furnaces; and Ido herebyfdeclare that thefollowng *is* a full, clear,` and exact description` ofthe "saine,reference?being hadato' `the accomfpanyingtl;drawingsglforming part of this fwspecicatonwinywhiche v i :Figure `l, isal ycentral vertical section t'aken in 1 a 1 longitudinal "direction, of the furnace andpart of a "boiler :constructed` according to my invention. Fig. 2, is :a `central vertical section of the furnace taken in a `transverse ffdirection; Fig;3,1isjallhorizontal section of the ashpannw" l1 Similarlletters oftreference `indicate corresponding parts ink-the` several figures.- d :This `invention consists in the peculiar ari `rangement of"waterspaces` within and con'- "tiguous tothe furnaceand leading `there- `frorntothe body of ltheiboiler."

d `It i also consists f in `aj? certain arrangement "of the re "grate combined `with the provi- `sion of traps in the ash lpan, and with \cer "tain` appliances in connection with thegrate 1 andthe said traps, wherebythe `grate and i "the said traps may be* opened to let out the lire and closed again immediatelyby the i engineer or fireman while Vat his usual post onthelocomotive;` A

l"LIt further consistsinproviding the` ash cpan with `a suitable arrangement of curls to check the dischargejof its contentsV during i `the running of the `engine in order without preventing affree "discharge of ashes coals &c. fallingfrom the fire to cause them` to lbe discharged by a circuitous ,course thereby i. .live coaljthatmay :fall through the. grate, and preventing injury. that might result from the discharge loflive coal upon the track. y i .i l To enable those skilled inthe art to make and use my invention "I fwill proceed to describe its construction` and operat-ion.

A, Ais the `furnace surrounded `with the [usual `water space a, a, which communicates with the cylindrical `body B, of the boiler `and with the steam chamber C,- in the usual `manner.

12,1), are lire tubesfleading in the `usual i way i from the furnace through the` body of the boiler to the smoke box and chimney.

UMTEDSTATESPATENT OFFICE 1 JDUTCHER QFNEV HAVEN,` CONNECTICUT.

Vallowing time"` for "the partial cooling of` l),is horizontal pipe leading from the `front to the back part of the water space a,

ofthe side pipe being'about level with the grate. This pipe I prefer to make of-flat form at the bottom and sides but to make its upper side rounded or of inverted V, form to prevent the settlement thereon of the dust from the tire. From this pipe D, into the centerof theire box which I prefer to make hollow inverted frustum of a cone E, `which rises about as high as the fire box is intendedto be lled with fuel, and the upper part of this cone E, is connected by a slightly conical plate F, with an upright cylinder or tube` Gr, Vwhich rises through the center `of the furnace "andconnects with the crown plate thereof. y

`A communication is by the above Vmeans established between thepipeD, and the steam chamber C. From the cylinder or tube` G, a horizontal tube I, runs some distance along the body of the boiler and opens thereinto. `The cone E, being surrounded by `the fire, has the water Within it exposed to an intense heat, and steam is rapidly generated, and the steam in rising produces arapid upward circulation ofwater from the bottom ofthe space a, al, through the tube D, the `inverted cone E, and cylinder G. This water is partly discharged by the pipe. I into` the body of the boiler at a distance from the fire box. The inverted cone not only has the advantage ofpresenting a large `heating surface in an effective manner to the irebutitprevents the fire packing, by

than atthe top Where it receives ythe fuel, and it allows the free escape of ashes.

`The iregrate is formed in two parts J, J, see Fig. 2, which are hinged to-opposite sides of the pipe D,`and are capable of openingdownward.V The ash pan H, has under the grate a number of openings each may be closed, the said trapsbeing `capable of opening downward by their own weight. The grates and thetraps c, 0, aresupported by arms d, d, and d', d', on an upright rod K, which is suspended from a lever L,

or fireman while at his usual post. The rod K, has to be incased within a small water tight tube e, which runs from `the bottom which is within the control of theA engineerl @,fjust above the fire grate, the bottom part of upright cylindrical form, there rises a making the irebox larger at the bottom provided with a hinged trap c, by `which it `of the tube D, clear up through the cone E,

and the cylinder G. A catch f, see Fig. l, or some other means of security must be employed to hold down the outer end of the lever L, and thereby hold up the rod Kv ash pan. The grates and the ash traps mayk be quickly replaced by pulling down and securing the outer end/of the lever. This will enable the fire when clinkered to be quickly let out and rebuilt by the iireman without leaving` his post onthe locomotive. In all the railroad stations, pits may be provided in the middle of the track to drop the tire into, but in case of great necessity the fire might be let out and rebuilt while the engine is running. l

The ash pan H, inclines downward toward the rear end, so that the ashes, Snc., falling on it from the lire, when the engine is in motion will gradually descend. Al most immediately in rear of the lire grate, an upright curb plate g, stands up from the bottom of the ash pan. This curb plate has a rounded front so that as the ashes &c strike it, they are thrown off toward the sides, where there is space enough left for them to escape. Behind the curb g, is a second curb plate It, which is so formed as to throw the ashes &c a little toward the center before letting them escape to the opening z', at the back of the ash pan where they drop out. By using curbs as above described t-o retard the escape of the ashes &c time is allowed for them to cool before leaving the ash pan, as there will always be a thin bed of ashes on the bottom of the ash pan any live coals falling through the grate, upon it, will be prevented quickly running out. f l

AWhat I claim as my invention and desire to secure by Letters Patent, is

1. The within described arrangement of water spaces within and contiguous to the furnace and leading therefrom to the body of the boiler consisting of the horizontal pipe D, inverted cone E, upright tube G, and horizontal tube I, all connected substant-ially as herein described.

2. In combination with a hinged lire grate or grates to the boiler furnace I claim providing hinged traps in the ash pan to be lowered and raised or lopened and closed simultaneously with the lire grate or grates, by means of an upright rod K, passing through the boiler and suspended from a lever L, wit-hin the control of the engineer or fireman, while at his usual post, the said rod K, operating upon the said grates and traps by means of arms d, d, d', cl, or their equivalents, all substantially as herein described.

3. Retarding the escape down the inclined ash pan of the ashes coal &c falling thereon through the grate, by ,means of curb plates g, L, arranged as described or in any equivalent manner to make the said ashes, coal &c take a circuitous direction.

' JOSIAH J. DUTCHER.

Witnesses:

JOHN C. HoLLrsTER, C. VVINSHIP. 

